Transcript Snorocket 2.0

Snorocket 2.0: Concrete Domains and
Concurrent Classication
Alejandro Metke-Jimenez | Postdoc, AEHRC
[email protected]
THE AUSTRALIAN E-HEALTH RESEARCH CENTRE | ICT CENTRE
Snorocket 2.0
 Motivation
 Architecture
 Concrete domains
 Test ontologies
 Experimental results
 Future work
 Our ontology tools
Motivation
• Snorocket was initially implemented to support SNOMED CT
authoring
• Some concepts cannot be correctly modelled without
concrete domains
• For example, “Hydrochlorothiazide 50mg tablet” cannot be
modelled without a data literal to represent the quantity of
the active ingredient
• AMTv3 has recently introduced concrete domains
Architecture
Architecture
Concrete Domains
• CEL normalisation algorithm works with minimal changes
• Added an additional completion rule
Test Ontologies
• SNOMED CT
• Australian Medicines Terminology v3 (with concrete domains)
• AMT axioms are more “complex” than the typical axioms found in
SNOMED CT
• High degree of nesting (e.g. to associate BOSS value and unit with
actual ingredient)
• Still simple to author since axioms follow same pattern
Ontology
# Classes
SNOMED CT 296518
AMTv3
61059
# Object
Properties
# Data
Properties
62
78
0
4
# Axioms
Original
660610
150750
Normalised
1169613
561331
Test Ontologies
Experimental Results
• Performance of tableaux-based reasoners was poor when
classifying AMT
• Elk is fastest
HermiT (1.3.7)
FACT++ (1.6.2)
jCel (0.15)
Snorocket (1.3.4)
Snorocket (2.0.1)
ELK (0.32)
SNOMED CT
1567.3
330
761
33.8
26
9.1
AMT
mem
4220
26.2
10.5
Future work
• Optimise multi-threaded implementation
• Incorporate restrictions necessary to ensure tractability when
dealing with concrete domains
• Explore mechanisms to incorporate units natively in
reasoning process
Our ontology tools
Ontology
Authoring
• Snorocket
• Snapper
Data
entry
• Ontoserver
Mapping
• Snapper
Querying
• Snorocket
• Ontoserver
Reasoning
• Snorocket
• Snorocket – ontology reasoner
• Open source – Apache 2.0
• Available in GitHub: https://github.com/aehrc/snorocket
• Ontoserver – ontology search
• Provides search over ontologies
• Available as a Java library and a REST API
sandbox: http://ontoserver.csiro.au:8080
• Based on Lucene and Solr
• Snapper
• Eclipse-based SNOMED CT mapping & refset tool
• Free for use in Australia
Questions?
Australian eHealth Research Centre
Alejandro Metke
Postdoctoral Research Fellow
Phone: 07 3253 3645
Email: [email protected]
Web: www.aehrc.com